Apex Devastator (M 220 M3C)

Cascade, cascade, cascade, cascade (When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom in a random order. Multiple instances of cascade each trigger separately.)

mythic
Creature — Chimera Hydra
From the Magic: The Gathering set Modern Horizons 3.